Adding to 20110211100 its reverse (111201102), we get a palindrome (20221412202).
It is a happy number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 220110211100 is an apocalyptic number.
20110211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 20110211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36454541760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20110211100 is a wasteful number, since it uses less digits than its factorization.
20110211100 is an odious number, because the sum of its binary digits is odd.
The spelling of 20110211100 in words is "twenty billion, one hundred ten million, two hundred eleven thousand, one hundred".